Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
新人注册送18元（网址:EDF6.COM）新人注册送18元_新人注册送18元_新人注册送18元_新人注册送18元_新人注册送18元新人注册送18元_新人注册送18元_新人注册送18元_6qP10P6q1
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
